topic Re: When exactly is PIT reset? Kinetis in Kinetis Microcontrollers https://community.nxp.com/t5/Kinetis-Microcontrollers/When-exactly-is-PIT-reset-Kinetis/m-p/225915#M4471 <HTML><HEAD></HEAD><BODY><P>Hi, Joe</P><P></P><P>Yes, PIT load their start values, as specified in their LDVAL registers, then count down until they reach 0. Each time a timer reaches 0, it will generate a trigger pulse and set the interrupt flag. Then they load their respective start value again. So it can reset value.</P><P></P><P>Hope my reply can help you.</P><P></P><P>Best Regards</P><P>Paul</P></BODY></HTML> Tue, 26 Nov 2013 00:58:53 GMT Paul_Tian 2013-11-26T00:58:53Z When exactly is PIT reset? Kinetis https://community.nxp.com/t5/Kinetis-Microcontrollers/When-exactly-is-PIT-reset-Kinetis/m-p/225914#M4470 <HTML><HEAD></HEAD><BODY><P>Is a Periodic Interrupt Timer (PIT) reset the moment the rollover/interrupt occurs, or the moment the interrupt flag is cleared?</P><P></P><P>Also, if poor code was involved and the interrupt took way to long, would such and interrupt routine be re-entrant? </P></BODY></HTML> Mon, 25 Nov 2013 17:33:06 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/When-exactly-is-PIT-reset-Kinetis/m-p/225914#M4470 ignisuti 2013-11-25T17:33:06Z Re: When exactly is PIT reset? Kinetis https://community.nxp.com/t5/Kinetis-Microcontrollers/When-exactly-is-PIT-reset-Kinetis/m-p/225915#M4471 <HTML><HEAD></HEAD><BODY><P>Hi, Joe</P><P></P><P>Yes, PIT load their start values, as specified in their LDVAL registers, then count down until they reach 0. Each time a timer reaches 0, it will generate a trigger pulse and set the interrupt flag. Then they load their respective start value again. So it can reset value.</P><P></P><P>Hope my reply can help you.</P><P></P><P>Best Regards</P><P>Paul</P></BODY></HTML> Tue, 26 Nov 2013 00:58:53 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/When-exactly-is-PIT-reset-Kinetis/m-p/225915#M4471 Paul_Tian 2013-11-26T00:58:53Z